Hand concrete-mixer.



R. L. MILLER,

HAND CONCRETE I'VIIXER.

APPLlCATlON FILED SEPT.23. I918.

1,293,506; 4 Patentefl Bob. 4, 1919.

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RICHARD L. MILLER, OF ST. LOUIS, MISSOURI.

HAND CONCRETE-MIXER.

Application filed September 23, 1918.

To all whom 2'25 may concern:

Be it known that I, RICHARD L. MILLER, a citizen of the United States,and resident of St, Louis, Missouri, have invented certain new anduseful Improvements in Hand ConcreteMixers, of which the following is aspecification.

This invention relates to improvements in a hand concrete mixer, and hasfor its object a suitable frame in which is axially mounted a containerin which the concrete is to be mixed, an agitator supported in thecontainer and handles for placing the container in partial rotation.

The essential feature of my invention is to construct a mixer in which acertain quantity of concrete can be mixed, the same being operated byhand and to be constructed of such material as to make the sameinexpensive and adaptable for use at any place or locality.

Figure 1, is a side elevation of my complete invention.

Fig. 2,-is a front view of the same.

Fig. 3, is a vertical central sectional view.

Fig. i, is a central cross sectional view.

Fig. 5, is a detail perspective view of a portion of the agitatortogether with the supporting block by which the agitator is supported inposition.

Referring to the general construction of my invention 6 indicates a baseframe consisting of two side timbers 7, base boards 8, a front cleat 9,and to the interior of the side timbers 7 are firmly bolted a pair ofuprights 10. Against the edges of the uprights 10 are fastened a pair ofcross members 11, which extend across the width of the frame 6 andassist in holding the uprights 10 in a rigid braced position.

Against the outer surface of both of the uprights 10 is attached a bracemember 12, which rests upon the upper edge of the side timbers 7 and tothe braces and against the side timbers 7 is firmly bolted a supportingmember 13.

In each of the uprights 10 and brace members 12 is provided an apertureor bore 14: in which are inserted nipples 15, which act as journalbearings for the center supporting shaft 16, which shaft is held inposition by means of the nuts 17.

Axially mounted on the shaft is a mixing compartment or receptacle 18,which consists of a pair of side walls 19, the edge being covered by astrip of sheet metal 20,

Specification of Letters Patent.

Patented Feb. 4:, 1919.

Serial No. 255,408.

7 the bottom of said receptacle being formed on the radius of a circle,while the upper open end 21 is approxin'iately rectangular in form.

011 each side of the receptacle is provided a handle 21 by which themixing compartment is operated so as to swing the same backward andforward on the axle 16.

On each side 19 of the receptacle I place an additional supportingmember 22 which is in the form of a strip running across the side andthrough this and the sides 19 is provided a bore 23 through which isinserted by a driving fit a pipe or tube 24, through which the shaft oraxle 16 is passed and which also acts as a proper journal bearing forthe movement of the mixing compartment.

On the inner sides of the walls 19 of the mixing compartment and inclose proximity with the tube 24 are secured supporting blocks 25 whichare provided with a rectangular recess 26, in which is inserted andsupported a cross bar 27, to which is firmly attached a plurality ofagitator arms 28.

It will be observed from the foregoing that the lower portion of themixing compartment is formed on the arc of a true circle, which permitsthe material to shift and change position more readily and uniformly,and the machine to be operated more easily by hand. The tube 24 inaddition 'to forming a bearing on which the mixing compartmentoscillates on the shaft,

also protects said shaft from the accumu-.

lations of cement and mortar thereon. The supporting blocks 25 answer asan inexpensive and firm support for the ends of the member or timber 27,which carries the agitator arms.

The general agitator construction is such that the same can be readilyand easily inserted in position or removed therefrom when necessityrequires; and when placed in position, the same may be held by placing ascrew through the walls 19 into the ends of the bar 27.

The general operation of my invention is as follows:

The required quantity of material to be mixed for forming a properconcrete mixture is inserted into the receptacle through the opening 21,then the required amount of water is added and then by partiallyrotating the receptacle by the manipulation of the handles 21, thereceptacle is rocked backward andforward in arcanner as that shown bydotted lines in Fig. 3, and by the moving process the agitators willpass through the material intermingling the various ingredients andafter the mixing process has been completed the mixture is thendischarged from the container by lowering the same in a position as thatshown by the dotted lines indicated by the numeral 29.

For a matter of cheapness the device is preferably constructed of woodthereby making the same of a nature which can be purchased and handledby a small contractor who is not financially able to purchase anexpensive mixing machine.

By practice the device has been found to operate successfully andthoroughly mixing the ingredients as is required in concreteconstruction.

Having fully described my invention whct I cla m is A concrete mlxercomprising a support,

'astationary shaft secured at its ends on said support, a mixerreceptacle having a curved bottom, a tube within said receptacle mountedon said'shaft, a cross-bar connected to said receptacle and agitatorbars secured to said cross bar and extending to near said curved bottom;and means connected with said receptacle for oscillatin the same on saidshaft, said tube being fixedly secured to the receptacle at its ends andforming a bearing for sa-idshaft.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing witnesses.

RICHARD L. MILLER. Vitnesses ALFRED A. EIoKs, B. AUsTINE.

Copies of this patent maybe obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G."

